US4317867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for an electric cell
Assignee: DITE GENERALE DE CONSTRUCTIONS ELECTRIQUE ET MECANIQUES "ALSTHOM & CITE SNC Ste
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Filing: 1980-10-14
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Granted: 1982-03-02
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Expires: 2000-10-14
Abstract
Abstract A porous electrode for an electric cell, said electrode including a support layer and an active or catalytic layer, the thickness of the electrode (1a, 1b, 1c, 1d) lying between about 50 and 600 microns and preferably between 100 and 250 microns, the active or catalytic layer (2) and the support layer (3) each including 60 to 99% by weight of a hydrophobic polymer or binder and 40 to 1% by weight of a carbon-based divided conductive compound the two layers being, in the aggregate, hydrophobic and intimately joined, current being drawn off at points or lines which are spaced apart by a distance of about one millimeter from one another by an electronically conductive collector (4) in contact at the points or lines with the support layer (3).
Inventors
- 👤 Bernard Warszawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
111 words
An electrode-collector assembly for an electric cell, said assembly comprising: a porous electrode consisting of two layers, an active or catalytic layer and a support layer, the total thickness of said electrode being between about 50 and about 600 microns, the active or catalytic layer and the support layer each comprising 60 to 99% by weight of a hydrophobic binder and 40 to 1% by weight of a carbon-based divided electrically conductive composition, and said two layers being hydrophobic in the aggregate and intimately bonded, and an electronically conductive collector in contact with said support layer at points or lines which are spaced apart by a distance of about 1 mm.
Claim 2
Dependent Claim
111 words
An electrode-collector assembly for an electric cell, said assembly comprising: a porous electrode consisting of two layers, an active or catalytic layer and a support layer, the total thickness of said electrode being between about 50 and about 600 microns, the active or catalytic layer and the support layer each comprising 60 to 99% by weight of a hydrophobic binder and 40 to 1% by weight of a carbon-based divided electrically conductive composition, and said two layers being hydrophobic in the aggregate and intimately bonded, and an electronically conductive collector in contact with said support layer at points or lines which are spaced apart by a distance of about 1 mm.
Claim 3
Dependent Claim
24 words
An electrode-collector assembly according to claim 1, wherein the thickness of said active or catalytic layer is between about 5 and about 100 microns.
Claim 4
Dependent Claim
24 words
An electrode-collector assembly according to claim 2 wherein the thickness of said active or catalytic layer is between about 20 and about 50 microns.
Claim 5
Dependent Claim
22 words
An electrode-collector assembly according to claim 1, wherein the thickness of said support layer is between about 45 and about 500 microns.
Claim 6
Dependent Claim
22 words
An electrode-collector assembly according to claim 4 wherein the thickness of said support layer is between about 100 and about 200 microns.
Claim 7
Dependent Claim
13 words
An electrode-collector assembly according to claim 1, wherein said hydrophobic binder comprises polytetrafluoroethylene.
Claim 8
Dependent Claim
16 words
An electrode-collector assembly according to claim 1, wherein said hydrophobic binder comprises polypropylene or polyvinyl chloride.
Claim 9
Dependent Claim
15 words
An electrode-collector assembly according to claim 1, wherein the carbon-based divided composition comprises powdered carbon.
Claim 10
Dependent Claim
17 words
An electrode-collector assembly according to claim 1, wherein the carbon-based divided composition comprises carbon or graphite fibres.
Claim 11
Dependent Claim
23 words
An electrode-collector assembly according to claim 9 wherein the powdered carbon is selected from the group consisting of carbon black and active carbon.
Claim 12
Dependent Claim
30 words
An electrode-collector assembly according to claim 1, wherein the carbon-based divided composition of the catalytic layer comprises divided carbon impregnated or associated with a catalyst for the electrochemical reaction concerned.
Claim 13
Dependent Claim
30 words
An electrode-collector assembly according to claim 1, wherein the porosity of the support layer and of the active or catalytic layer is substantially between 10 and 80 percent by volume.
Claim 14
Dependent Claim
17 words
An electrode-collector assembly according to claim 1, wherein said collector comprises a corrugated impermeable electrically conductive sheet.
Claim 15
Dependent Claim
20 words
An electrode-collector assembly according to claim 1, wherein the contact between said collector and said electrode is maintained by pressure.
Claim 16
Dependent Claim
20 words
An electrode-collector assembly according to claim 1, wherein the contact between said collector and said electrode is maintained by welding.
Claim 17
Dependent Claim
24 words
An electrode-collector assembly according to claim 1, wherein the contact between said collector and said electrode is maintained by means of a conductive glue.
Claim 18
Dependent Claim
22 words
An electrode-collector assembly according to claim 1 wherein the overall thickness of said electrode is between about 100 and about 250 microns.
References Cited (Backward Citations)
US3553022A
Cited
US3733221A
Cited
FR2215710B1
Cited
FR2258007B1
Cited
US4091176A
Cited
US4104197A
Cited
FR2344969B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |